1. Physical faculty, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
2. Department of Chemistry, University of California at Berkeley, Berkeley, California 94720, USA
3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
4. Helmholtz Institute Mainz, Johannes Gutenberg University, 55099 Mainz, Germany
5. Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA
6. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
7. Resource Center “Optical and laser methods of material research,” St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
8. Center for Magnetic Resonance, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia